CZ306730B6 - A device for adjusting the brightness of the target marker in an illuminator, in particular in a targeting telescope - Google Patents

Abstract

The device for adjusting the brightness of the target marker in an illuminator of a targeting telescope, which is fixedly connected to the illuminator and comprises a static element and a rotationally movable element. The rotationally movable element comprises the sleeve (1) with a scale, where the plastic washer (11) is located in the sleeve (1) and is provided, on the one hand, with a set of permanent magnets (12) arranged in a circle, and, on the other hand, with the recesses (13) arranged in a circle. The static element of the device, fixed by means of the base (6) to the illuminator, is formed by at least a pair of the Hall probes (22) mounted on the bottom of the electronic board (21) in the space above the set of the magnets (12), while the electronic board (21) is equipped with electronics for evaluation of the size of Hall voltage connected to the illuminator. Further, at the bottom of the electronic board (21), the resilient hitch (51) is fastened by means of the fixing nut (52), whose mandrel (53), in its functional state, engages into the recess (13) in the plastic plate (11). Above the electronic board (21), there is located the plastic housing (3) with the fastening pad (31), with the battery (4) and the contact strip (41) that forms the positive contact of the battery (4). Under the battery (4), there is placed the contact screw (42) that forms the negative contact of the battery (4) and which, in its functional assembly, is fixedly screwed to the axial roller (61) of the base (6) via the attaching nut (23) of the electronic board (31) and via the fixing nut (52) of the resilient hitch (51). The device is closed, from above, with the cap (7). Under the cap (7), there is inserted the pressure spring (43) of the battery (4). The base (6) is fixed to the illuminator by means of the fastening screws (62).

Description

Field of the invention

BACKGROUND OF THE INVENTION The invention relates to a device for adjusting the brightness of a sight mark in an illuminator, in particular of a telescope, which consists of a static element fixed to the illuminator and a rotatable movable element by means of which the brightness is manually adjusted.

BACKGROUND OF THE INVENTION

The aiming binoculars are provided with a purposeful mark, by means of which the target is practically focused. In practice, it is necessary to adjust the brightness of the intentional mark to the amount of ambient light and the subjective needs of the user. Known solutions typically use mechanical contacts to control the electronics that control the brightness of the intentional brand. Such contacts are switches or sliding slip contacts and the like. The actuator is rotatable and is typically characterized by the gradual alignment of the control resistors into the light source circuit for the intentional marker. The resilient contact, which is mechanically connected to the rotary actuator, moves over the contact pads on the electronics board, whereby suitable resistors are sequentially engaged. Alternatively, a full-area resistor of the potentiometric type is used for this purpose, where the brightness control effect is related to the magnitude of the resistor involved and the direction of rotation of the control. As the resistor decreases, the brightness increases, while the resistor increases, the brightness decreases.

The control is often used, so it wears out and loses its reliability and stability. From a mechanical point of view, known devices are demanding in terms of manufacturing accuracy, which results in high production costs. After the period of use, it is always necessary to readjust and adjust the parameters of the intentional mark exposure. The adjustment range is limited by the dimensions of the mechanical elements. From the electrical point of view, we see disadvantages in the instability of the transient resistance between the rider and the contact pads. Especially in the field of small currents, ie when low brightness is needed, there is also unreliability associated with temperature changes, transition resistance, material fatigue.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device which allows unlimited continuity of the exposure control. The device should be usable for night and day illumination of the intentional mark, thus allowing a wide range of regulation. The primary setting or correction of the exposure value should be made objectively by software, ie without the need for mechanical adjustment. Practical adjustment of the brightness values when using the device should be simple and fast. It is also desirable from a production point of view to utilize low-cost components, i.e. wage moldings, as small as possible, and to minimize the amount of chips to be machined.

SUMMARY OF THE INVENTION

This object is achieved by a device for adjusting the brightness of a sight mark in an illuminator of a sighting telescope, which is fixedly connected to the illuminator and comprises a static element and a rotatable movable element. a plastic washer is provided with both a system of ring-shaped permanent magnets and a system of ring-shaped recesses. The static element of the device, fixed by means of a base to the illuminator, consists of at least a pair of Hall probes mounted on the bottom of the electronic board in the space above the magnet assembly. The electronic board is equipped with electronics for evaluating the magnitude of Hall voltage connected to the illuminator. Furthermore, an elastic catch is fastened to the bottom of the electronic board by means of a fixing nut, whose darkness fits in the recess in the plastic support in the functional state. Above the electronic board is placed a plastic case with a fixing pad, with a battery and a contact

C / 306730 136 with a strip that forms the positive contact of the battery. Below the battery is a contact screw that forms the negative contact of the battery. In a functional assembly, it is firmly screwed into the axle roller of the base through the mounting sleeve of the plastic housing, the mounting plate of the electronic board and the fixing nut of the flexible snap.

Typically, the device is closed from above by a lid under which a battery pressure spring is inserted.

Usually the base is fixed to the illuminator by means of fastening screws.

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The advantage and higher effect of the solution is a long service life of the device, simple and inexpensive production. From a functional point of view, it brings the possibility of primary or correction brightness adjustment by software, while during the use of the device it allows for a substantially continuous brightness regulation over a wide range. It is well usable for both day and night use. From the user's point of view, operation is simple. With long-term use, it exhibits significantly less wear compared to known designs of similar devices.

Clarification of drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is described in more detail with reference to the accompanying drawings, in which: FIG. 1 is a perspective view of a device with partial vertical section in two planes; FIG. 2 is a front view with partial revealing of the rotating sleeve. Fig. 3 shows the device in an exploded state, where all the construction elements of the device are visible.

DETAILED DESCRIPTION OF THE INVENTION

The technical solution of the luminance adjustment device is based on the principle of the Hall effect, in which, in a Hall probe, usually a narrow semiconductor plate through which current passes, a magnetic induction generates a magnetic induction causing changes in the so-called Hall voltage.

The device consists of two basic components. It is a rotatable movable element and a static element. The static element is fixedly anchored to the illuminator body, the rotatable movable element is rotatable relative to the static element in a common axis.

The rotatable movable element is formed by a scale sleeve 1. In the sleeve 1 there is a plastic washer 11 into which the permanent magnets 12 arranged in a circle are pressed. In the plastic 40 the washer 11 are also arranged in a circle a slot-like recesses 13.

The static element of the device is anchored to the illuminator body by the base 6 and the fastening screws 62. The base 6 has an axial roller 61 with an internal thread extending upwardly through the rotatable movable element.

The static element is provided as a basic structural element with at least a pair of Hall probes 22, which are mounted at the bottom of the electronic board 21 in the space above the set of magnets 12. The electronic board 21 is equipped with Hall voltage evaluation electronics connected to the illuminator.

Furthermore, a resilient catch 51 is fastened to the bottom of the electronic board 21 by means of a fixing nut 52, whose mandrel 53, in its operative state, fits into recesses 13 in the plastic support H.

Above the electronic board 21 there is a plastic housing 3 with a fixing washer 31, 55 with a battery 4 and a contact strip 41 which forms the positive contact of the battery 4. Under the battery 4, the contact screw 42 forms the negative contact of the battery 4. The bolt 42 in the operative assembly is firmly screwed into the axle roller 61 of the base 6 through the fixing washer 31 of the plastic housing 3, through the fixing nut 23 of the electronic board 21 and through the fixing nut 52 of the resilient catch 51.

From above, the assembly of the brightness adjustment device is closed by a lid 7 under which the pressure spring 43 of the battery 4 is.

As the scale sleeve 1 is rotated, the magnet assembly 12 and the resilient catch 51 are rotated, and the mandrel 53 gradually fits into the recesses 13 in the plastic support 11. Thus, the pitch of the recesses 13 affects the smoothness of the brightness adjustment. As the magnet assembly 12 is rotated, a change in the magnetic field under Hall probes 22 results in a change in the Hall voltage. This change is sensed by the electronics on the electronic board 21 and evaluated to control the illuminator. Of course, the magnets 21 are not in direct contact with the Hall probes 22.

Industrial applicability

The device for adjusting the brightness of the sight mark in the illuminator of the riflescope is industrially manageable and particularly useful for riflescopes.

Claims (4)

PATENT CLAIMS A device for adjusting the brightness of a sight mark in an illuminator of a sighting telescope, which is fixedly connected to the illuminator and comprises a static element and a rotatable movable element, characterized in that the rotatable movable element is formed by a graduated sleeve (1); 1) a plastic washer (11) provided with a set of ring-shaped permanent magnets (12) and a set of ring-shaped recesses (13) is provided, the static element of the device fixed by means of the base (6) to the illuminator. probes (22) mounted at the bottom of the electronic board (21) in the space above the mag35 net system (12), the electronic board (21) being equipped with a size evaluation electronics Hall voltage connected to the illuminator, furthermore, at the bottom of the electronic board (21) is fixed by means of a fixing nut (52) an elastic catch (51) whose darkness (53) fits into the recesses (13) in the plastic support (11) an electronic plate (21) is provided with a plastic housing (3) with a mounting washer (31), a battery (4) and a contact strip (41) which forms the positive contact of the battery (4); a bolt (42) that forms the negative contact of the battery (4) and which is operatively assembled through the fastening washer (31) of the plastic housing (3), the fastening nut (23) of the electronic board (21) and the fixing nut (52) The retainer (51) is firmly screwed into the axial roller (61) of the base (6). 45 A brightness adjusting device according to claim 1, characterized in that it is closed from above by a lid (7). Device for adjusting the brightness of a sight mark according to claim 2, characterized in that a pressure spring (43) of the battery (4) is inserted under the lid (7). A brightness adjusting device according to claim 1, characterized in that the base (6) is fixed to the illuminator by means of fastening screws (62).